JPS6246958Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a water sprinkling device as a heat source used in an open rack vaporizer for vaporizing liquefied gas.

There are various types of liquefied gas vaporizers, and each type is used depending on the purpose and application. Among these, open rack type vaporizers are frequently used because of their simple construction as described below, economical efficiency, stability of vaporization performance, and ease of maintenance and maintenance.

The general structure of an open rack type vaporizer is as follows. Seawater or water is dropped along the panel as a heat source from the top of the panel unit, which consists of a panel with many tubes arranged in a curtain shape, a lower header that supplies liquefied gas to the bottom of the panel, and an upper header that collects vaporized gas. Then, while the liquefied gas rises from the lower header into the tube of the panel, heat exchange progresses, vaporization is completed, and it flows from the upper header to the gas storage tank.

Seawater is mainly used as a heat source for economical reasons. Conventionally, water sprinklers that drop seawater along the panels have box-shaped troughs with open tops installed opposite each other on both sides of the top of the panel. The water is introduced from a water nozzle facing the opening of the trough and overflows from the edge of the upper edge of the trough on the panel side. The water spray nozzles are configured to branch out into a large number from water spray headers arranged in parallel below the trough and face above the trough. A partition plate is provided within the trough to prevent the ripples of water falling from the nozzle from being transmitted to the water overflowing from the edge.

By the way, when seawater is used as a heat source, conventional water spraying equipment usually has 12 to 24 watering nozzles branching from the watering header for one panel unit.
Because it was difficult to maintain the flow velocity within the header at a constant level over its entire length, marine organisms such as algae and shellfish could grow inside.
It also adheres to the space between the lower end of the partition plate in the trough and the bottom of the trough, and to the corners of the bottom surface. These grown shellfish may flow downstream and get stuck in the gap between the panel and the edge. If the seawater falling along the panel is interrupted by stuck shellfish, not only will vaporization not proceed within the panel tube, but there is a risk that the corresponding part of the panel will be exposed to local thermal stress.

Therefore, this invention proposes a water spraying device configured to prevent marine organisms from adhering to the inside of water supply pipes, troughs, etc. that supply seawater.

That is, this invention includes a trough with an open top surface of one tank provided in parallel between a pair of panels, and an edge portion protruding diagonally downward on the panel side at both upper edges of the trough facing the panels. A pair of flat partition plates arranged inside the trough, the upper opening of the trough, the sides,
This is a water sprinkling device consisting of a water supply pipe facing one of the bottoms or connected to an opening, and an ultraviolet irradiation lamp installed above the opening of the trough.

The water sprinkling device according to this invention will be explained below based on the drawings. FIG. 1 is a longitudinal sectional view of the water sprinkler, and FIG. 2 is a partial top view.

A plurality of panel units 3 are arranged in parallel, each consisting of a panel 1 in which a large number of tubes are arranged in a curtain shape, a lower header (not shown) that supplies liquefied gas to the lower part of the panel 1, and an upper header 2 that collects vaporized gas. has been done. Here, troughs 4 with open tops are provided parallel to the panels 1, one tank at a time, between the panel units 3 arranged in parallel. Its length is panel 1
Depending on the length, both sides of the trough 4 are provided between a pair of panel units 3 with a width that allows them to face each panel 1. An edge part 5 projecting obliquely downward is provided at the upper edge of the trough 4 on each panel 1 side, and the seawater supplied into the trough 4 overflows from the edge part 5 and falls along the panel 1.

Next, water is supplied into the trough 4 by piping a water supply pipe 7 above the opening surface of the trough 4, with its pipe end 8 facing the opening surface. Although the drawing shows a case in which the tube end 8 faces the center of the trough 4, it is also possible to arrange tube ends on both ends of the trough 4, respectively.
Alternatively, a hole may be formed in the side surface of the trough 4 located perpendicular to the panel 1, and a water supply pipe 7 may be connected thereto to allow seawater to flow in. Furthermore, it is also preferable to open a hole in the center of the bottom of the trough 4 and insert and connect the water supply pipe 7 thereto.

In order to prevent the seawater from rippling on the water surface of the trough 4 during the above-mentioned water supply and propagating to the edge portion 5 and causing a change in the amount of overflowing water, the tip of the water supply pipe 7 is inserted into the trough 4. Two partition plates 6 are provided. Since the supplied seawater flows to the edge portion 5 through between the lower end of the partition plate 6 and the bottom surface of the trough 4, ripples on the water surface between the partition plates 6 do not propagate to the edge portion 5. The shape of the partition plate 6 may be a flat plate or a perforated plate as shown in the drawing, or may be a conventional L-shape, and various shapes can be used.

A plurality of ultraviolet irradiation lamps 9 are installed at appropriate intervals above the opening of the trough 4 in a direction perpendicular to or parallel to the trough 4. It is also possible to attach an umbrella or the like to cover the lamp 9 above the lamp 9 to increase the amount of irradiation. The number, size, etc. of the lamps 9 may be determined based on the size of the trough, the flow rate of seawater, etc.

The water spraying device constructed as described above has the same ability to spray water on panels as the conventional device, has a simpler structure, eliminates the need for the conventional watering nozzle and watering header, and has a simple structure with a top surface. Since the troughs are open, maintenance and inspection are not only easy, but also because water is supplied to each trough using a single water supply pipe, the flow velocity inside the water supply pipe can always be maintained above a certain value over the entire length, which reduces the flow of water into the pipes. This prevents marine organisms from adhering to the trough, and furthermore, the installation of an ultraviolet irradiation lamp prevents marine organisms from attaching and growing inside the trough due to ultraviolet irradiation. In other words, this devised device eliminates the drop in water sprinkling ability due to marine organisms adhering to it, unlike conventional devices, and can provide stable water sprinkling ability over a long period of time. There is no need to add chlorine, etc., and there are no problems caused by adding chlorine, etc.

[Brief explanation of drawings]

FIG. 1 is a partial longitudinal cross-sectional view of the sprinkler system according to this invention, and FIG. 2 is a partial top view thereof. In the figure, 1...panel, 2...upper header, 3...
... Panel unit, 4 ... Trough, 5 ... Edge part, 6 ... Partition plate, 7 ... Water supply pipe, 8 ... Pipe end,
9... Ultraviolet irradiation lamp.

Claims (1)

[Scope of utility model registration request] In an open rack type vaporizer consisting of a plurality of panel units arranged in parallel, there is a trough with the top of one tank opened in parallel between each panel unit, and a panel-side trough on both upper edges of the trough facing the panel. The edge of the trough projects diagonally downward, two partition plates are placed inside the trough to divide the inside of the trough into three rooms, and one of the top opening, side, and bottom of the trough is exposed. Alternatively, an open rack vaporizer watering system consisting of an open and inserted water supply pipe and an ultraviolet irradiation lamp mounted above each trough.